Triggering on B-jets at CDF II

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In this paper we present a trigger algorithm able to select online events enriched of b-jets. This feature is of central interest in order to extend the physics reach for standard model and minimal super symmetric model Higgs decaying into a pair of b-quarks. The algorithm fully exploits the recently upgraded CDFII tracking system and Level 2 CALorimeter cluster finder. These upgrades are necessary to cope with Tevatron increasing luminosity and provide new and refined trigger primitives that are the key elements of our algorithm together with the already existing silicon vertex trigger. A b-hadron can travel some millimeters before ... continued below

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6 pages

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Amerio, Silvia; /Padua U. /INFN, Padua; Casarsa, Massimo; /Fermilab; Cortiana, Giorgio; /Padua U. /INFN, Padua et al. January 1, 2009.

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Description

In this paper we present a trigger algorithm able to select online events enriched of b-jets. This feature is of central interest in order to extend the physics reach for standard model and minimal super symmetric model Higgs decaying into a pair of b-quarks. The algorithm fully exploits the recently upgraded CDFII tracking system and Level 2 CALorimeter cluster finder. These upgrades are necessary to cope with Tevatron increasing luminosity and provide new and refined trigger primitives that are the key elements of our algorithm together with the already existing silicon vertex trigger. A b-hadron can travel some millimeters before decaying and the trigger algorithm exploits this characteristic by searching for tracks displaced with respect to the primary vertex and matched to energetic jets of particles. We discuss the study and the optimization of the algorithm, its technical implementation as well as its performance. The new trigger provides an efficient selection for Higgs decaying into a pair of b-quarks and runs up to high luminosity with an acceptable occupancy of the available bandwidth.

Physical Description

6 pages

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  • Journal Name: IEEE Trans.Nucl.Sci.56:1690-1695,2009; Journal Volume: 56; Journal Issue: 3

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  • Report No.: FERMILAB-PUB-09-411-E
  • Grant Number: AC02-07CH11359
  • DOI: 10.1109/TNS.2009.2020405 | External Link
  • Office of Scientific & Technical Information Report Number: 963784
  • Archival Resource Key: ark:/67531/metadc926596

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • January 1, 2009

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  • Nov. 13, 2016, 7:26 p.m.

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  • Dec. 2, 2016, 4:21 p.m.

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Amerio, Silvia; /Padua U. /INFN, Padua; Casarsa, Massimo; /Fermilab; Cortiana, Giorgio; /Padua U. /INFN, Padua et al. Triggering on B-jets at CDF II, article, January 1, 2009; Batavia, Illinois. (digital.library.unt.edu/ark:/67531/metadc926596/: accessed December 18, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.